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06-11-2022, 12:49 AM | #1 |
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High-pitch chirping from engine bay (not the normal injector noise)
I have a 2013 M5. Recently started hearing a high-pitched chirping at idle. Initially thought it was a bad idler pulley but after peeking around the engine bay with the engine running, it seems to be coming from the 2nd bank high pressure fuel pump. Is this a common issue? How difficult is the replacement of one of those pumps?
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06-12-2022, 11:34 PM | #2 |
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Chirping? as in it cuts in and out very quickly? that sounds like a bad belt or steering pump
If it was a continuous whine type of noise I'd tell you that's 100% just your dct pump, i hear that especially when it's cold. But for chirping I can't really imagine what that could be besides some belts. |
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06-14-2022, 09:55 PM | #5 |
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Was able to speak to some people elsewhere and was able to get a video to them. They suspect it may be the cam follower / lifter for the high pressure fuel pump. $40 OEM part and a $5 gasket. Going to give it a try next week just for peace of mind as I'd hate to hurt a cam and we'll go from there. Comes and goes for me as well.
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06-15-2022, 07:19 PM | #7 |
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Give this a try let me know if you can't view the videos. Kind of hard to hear the higher-pitched screeching over the normal injector/pump tick. Sounds like a squeaky pulley but it's definitely coming right from the pump area and not the front of the engine unless there's something it could be coming from right under the passenger side airbox.
https://www.youtube.com/shorts/5iP2laWFANg |
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06-15-2022, 08:18 PM | #8 |
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From the video it does sound like it's the HPFP,
Do you have access to any data logging to see fuel pressure from the pumps, it might be failing. And also to help you pin point that kind of noise see if you can get you hands on a automotive stethoscope it will help a lot |
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06-16-2022, 08:40 AM | #9 | |
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06-16-2022, 11:05 PM | #10 | ||
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But usually you will feel sluggish feeling under hard excel like no power. Have you scanned it what code is it setting? |
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06-17-2022, 07:56 AM | #11 | |||
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06-17-2022, 07:17 PM | #12 | ||||
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06-22-2022, 11:54 PM | #13 |
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So I just replaced the fuel pump cam lifter. I don't think it was my pump as I discovered the pumps have already been replaced. The lifter replacement wasn't difficult and took 20 minutes. The lifter that came out of the engine didn't appear defective. For what it's worth, the car hasn't made any sounds since but it was a bit intermittent so time will tell whether this fix has worked long-term.
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06-23-2022, 08:57 PM | #14 | |
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06-28-2022, 07:01 PM | #15 | ||
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07-02-2022, 04:46 PM | #16 |
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07-02-2022, 11:28 PM | #17 | |
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08-17-2023, 12:47 PM | #18 |
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